Prehistoric bryozoans

thumb|right|Trepostome bryozoan with bioerosion; [[Bellevue Formation, Upper Ordovician (Katian), northern Kentucky.]]

Cystoporida, also known as Cystoporata or cystoporates, are an extinct order of Paleozoic bryozoans in the class Stenolaemata. Their fossils are found from Ordovician to Triassic strata.

Fenestrida is an extinct order of bryozoans in the class Stenolaemata.